Semi automatic oiling die stock

ABSTRACT

An improvement in hand operated ratchet die stocks of the semiautomatic oiling type, whereby oil or other suitable lubricantcoolants may be applied semi-automatically to die stocks and the material being threaded evenly and efficiently with a minimum effort on the part of the operator by utilizing a pressurized reservoir containing cutting oil or other suitable lubricants or liquids with the reservoir being pressurized by a cartridge containing carbon dioxide(CO2),ethyl chloride or other suitable pressurizing agents or means of pressurization.

United States Patent 1191 Swindell et al.

SEMI AUTOMATIC ()lLlNG DIE STOCK [76] Inventors: E. LeRoy Swindell, 5 E. 51st St.,

Apt. 3A, New York, NY. 10022; Michael Peter Amodio, 102 lven Ave., Pelham Manor, NY. 10803 [22] Filed: Oct. 26, 1972 [21] Appl. No.: 300,987

[52] U.S. Cl 10/106, 184/7 R, 222/399 [51] Int. Cl. 823g 1/00 [58] Field of Search 222/399; 184/29, 7 R, 54, 184/55 R, 14; 137/68, 209; 10/106 [56] References Cited UNITED STATES PATENTS 1,259,264 3/1918 Methuen 184/54 1,859,882 5/1932 Nonnemun 10/106 2,118,381 5/1938 Hunter 222/399 X 2,261,834 11/1941 Morgan 222/399 X Jan. 28, 1975 Falco 10/106 X 2,975,441 3/1961 2,976,897 3/1961 Beckworth... 222/399 X 3,613,954 10/1971 Bayne 222/399 X Primary E.raminer-Manue1 A. Antonakas Attorney, Agent, or Firm-E. LeRoy Swindell [57] ABSTRACT 1 Claim, 3 Drawing Figures 1 SEMI AUTOMATIC OILING DIE STOCK BACKGROUND OF THE INVENTION In the mechanical crafts such as the electrical and plumbing trades, a well known thread chasing apparatus called a stock and die is used by craftsmen and others to thread pipes, rods and bolts and other material. To prolong the life of the cutting dies, as well as to obtain perfect threads, it is essential that the die and the material being threaded is supplied with sufficient cutting oil during the thread chasing operation. The oil cools the die as well as the cutting surface of the material and removes superfluous cuttings and metallic chips produced by the threading operation by creating a wash or rinse.

It is generally recognized that it would be preferable to have the cutting oil applied semi-automatically at the option of the operator throughout the thread-cutting operation; however, it is obvious that this can not be done in the present art with a conventional hand operated die stock which requires that the operator use both hands while operating the tool.

DESCRIPTION OF PRIOR ART In the past numerous semi-automatic devices for applying oil to stock and die and to pipes, bolts or other surfaces as they are being threaded have been developed, but none of these semi-automatic devices have been successfully used with the conventional manual stock and dies and in most instances at the present oil is delivered to the die and material by the operator through the use of an ordinary oil can.

The heretofore described semi-automatic and manual applicators are universally inconvenient to operate or inefficient when applied to the conventional manual threading machine inasmuch as the gravity flow of the lubricant is not suitably supplied at a constant rate to the die and work, and the manual method of dispensing the lubricant further interrupts the threading task and renders this method of lubrication impractical and, indeed, both methods often cause a result which is less than acceptable since there is die chattering and skipping from overheating of the die and poor cutting results due to improper lubrication during the threading operation.

The requirement that the operator interrupt the threading operation to apply lubricating oil to the cutting die is, perhaps, the principal disadvantage of the conventional die stock. In practice, during these interruptions, the operator frequently applies too much oil to the cutting die and work piece, and by the time he has wiped his hands and resumed the threading task, there is an insufficient oil supply remaining at the point where it is needed, the bulk having run off or dripped onto nearby pieces of machinery and equipment, possibly damaging the same, or even onto the floor, thereby creating safety hazards.

SUMMARY OF INVENTION An improvement in radial thread chasing tool of the manual stock and die type; and, in that connection, an improvement which relates to semi-automatically dispensing of the lubrication necessary in the threading operation; specifically our invention is composed of a stock and die with a detachable or built-in pressurized reservoir, which contains a cutting agent such as oil and a pressure-coolant agent such as carbon-dioxide, or

ethyl chloride. The reservoir is pressurized by a gas cartridge or by other suitable means.

The gas functions as a dispensing agent whereby the liquid lubricant is atomized to speedily form an even coating on both the die and material being threaded. The gas causes sufficient pressure to blow away spent lubricant from both the die and the material being worked. In addition the liquid lubricant has a heat removing characteristic which reduces the temperature in the die and coincidentally in the material being worked. A further object is to provide an oil dispensing component which is less likely to leak, drip or run during the time the die is not in use. Other objects and advantages of the invention are to provide a die stock with related components which will provide all of the heretofore mentioned advantages yet simple in plug-in types construction; simple to adjust, inexpensive to produce; and, extremely easy to operate.

Our invention is a threading machine incorporating an oiling component which delivers oil semi-automatically under pressure and does not rely upon gravity flow, and thus is capable of delivering sufficient oil to the stock and die and the material being threaded regardless of the position or disposition of the machine itself. The oil reservoir may be integral with the handle of the machine, the said handle being hollow and may serve as a containment for the oil there being passageways in the stock head in communication with the reservoir allowing the oil to pass through by the actuation of a lever or push-button; or, the reservoir may be detachable and disposable or detachable and refillable.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 discloses a front view elevation of the oiling component secured and supported by the threading machine.

FIG. 2 discloses details of the push button valve stem in FIG. 1.

FIG. 3 discloses another view of the oil path to the die teeth.

A gas pressure cartridge 1 is shown at the top of the main embodiment FIG. 1. Said cartridge is shown inserted and has been punctured by puncture pin 2 and lubricant coolant is shown flowing past a ball check valve 2a into reservoir 2b thereby pressurizing the liquid lubricant and dispensing same on the cutting edge of the die 5.

A filling cap 3 is shown which is removable when refilling the reservoir with lubricant.

A push button type stem valve 4 is generally shown on the main embodiment FIG. 1 with details in FIG. 2. Valve stem 4c works against the tension of spring 412 and is actuated by push-button 4a thereby allowing passage of the lubricant-coolant through part 4d from the reservoir into the lower chamber 4e and thence through the oil feed pipe 5 to the die teeth and material being worked.

Having thus described our invention we claim:

I. In combination with a thread chasing annular die holder frame, a releasably mounted die head with a multiplicity of lubricating ports extending therefrom to match a receiving port of the die frame, said die head detachably mounted into the die frame whereby said ports upon matching will conduct lubricant unto the die teeth and the materials being threaded, a reservoir contained in said die holder frame with a removable lu- 4 in said die holder frame, and a pressurized gas cartridge chamber inserted into said chamber adjacent to and overlying said pin, whereby said cartridge will rupture thus opening the ball valve and energizing the lubri- 

1. In combination with a thread chasing annular die holder frame, a releasably mounted die head with a multiplicity of lubricating ports extending therefrom to match a receiving port of the die frame, said die head detachably mounted into the die frame whereby said ports upon matching will conduct lubricant unto the die teeth and the materials being threaded, a reservoir contained in said die holder frame with a removable lubricant filler cap and a lubricant outlet a spring-loaded push-button valve with a stem having a port and secured to said die holder frame such that upon engaging the button the port will align with the lubricant outlet thereby allowing lubricant to flow from the reservoir to tHe die head assembly, a normally closed spring loaded ball-check valve assembly with a puncture pin disposed in said die holder frame, and a pressurized gas cartridge chamber inserted into said chamber adjacent to and overlying said pin, whereby said cartridge will rupture thus opening the ball valve and energizing the lubricant. 